Siemens SIMATIC S7-400 Alternatives 2026 - Top Competitors Ranked

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Siemens SIMATIC S7-400

The Siemens SIMATIC S7-400 is a robust, modular industrial controller utilizing PROFIBUS DP and PROFINET communication protocols for connecting to field devices and higher-level systems in automation applications.

8.9 Great

apps Top Siemens SIMATIC S7-400 Alternatives

The top alternative to Siemens SIMATIC S7-400 in 2026 is Allen-Bradley ControlLogix with a score of 9.2/10, followed by Mitsubishi MELSEC iQ-R Series (9.1) and B&R X20 Automation System (9.1).

Allen-Bradley ControlLogix

The Rockwell Automation ControlLogix is a modular, scalable industrial controller platform commonly used for process aut...

Rockwell Multi Discipline High End Current

9.2 Excellent

Mitsubishi MELSEC iQ-R Series

The Mitsubishi MELSEC iQ-R series is a modular, programmable industrial controller offering flexible I/O options and int...

Mitsubishi High End PLC Current

9.1 Excellent

B&R X20 Automation System

The B&R X20 Automation System is a robust, industrial controller designed for complex machine automation tasks, offering...

Modular Multi Axis PLC Current

9.1 Excellent

Siemens SIMATIC S7-300

The Siemens SIMATIC S7-300 is a widely deployed, modular industrial controller commonly used for automating processes in...

Modular Legacy Manufacturing PLC

8.9 Great

Siemens SIMATIC S7-1200

The Siemens SIMATIC S7-1200 is a versatile, programmable logic controller (PLC) designed for automation tasks across var...

Compact PLC Siemens Current

8.7 Great

Mitsubishi MELSEC Q Series

The Mitsubishi MELSEC Q Series is a family of versatile, modular industrial controllers offering integrated processing,...

Modular Legacy Manufacturing Mitsubishi

8.7 Great

Mitsubishi MELSEC FX5U

The Mitsubishi MELSEC FX5U is a versatile, modular industrial controller utilizing a high-speed processor and offering i...

Compact Mitsubishi PLC Current

8.7 Great

Keyence KV-8000

The Keyence KV-8000 is a robust, industrial controller designed for precise automation tasks, featuring integrated I/O m...

High Speed PLC Current Keyence

8.7 Great

Allen-Bradley SLC 500

The Rockwell Automation Allen-Bradley SLC 500 is a modular, programmable logic controller (PLC) platform designed for in...

Modular Legacy Rockwell Discrete

8.5 Great

Omron Sysmac NX1P2

Omron Sysmac NX1P2 is a versatile, programmable industrial controller utilizing a modular architecture for flexible auto...

Compact Omron PLC Current

8.5 Great

Allen-Bradley PLC-5

The Rockwell Automation Allen-Bradley PLC-5 is a widely deployed, digitally-controlled system offering robust I/O capabi...

Classic Legacy Rockwell PLC

8.3 Great

Omron CJ2M

The Omron CJ2M is a robust, modular industrial controller designed for diverse applications like robotics, machine autom...

Modular Mid Range Omron PLC

8.3 Great

B&R X90 Mobile Controller

The B&R X90 Mobile Controller is a rugged, fully functional industrial controller designed for on-site machine control a...

Outdoor PLC Current Br Automation

8.3 Great

Schneider Electric Modicon Quantum

The Schneider Electric Modicon Quantum is a versatile, programmable industrial controller designed for applications rang...

Legacy Schneider High End PLC

8.2 Great

Phoenix Contact AXC F 2152

The Phoenix Contact AXC F 2152 is a robust, universal industrial controller utilizing a modular design with integrated E...

Phoenix Contact PLC Current Axioline

8.2 Great

Schneider Electric Modicon M340

The Schneider Electric Modicon M340 is a versatile, programmable logic controller (PLC) designed for industrial automati...

Mid Range Manufacturing Schneider PLC

8.1 Great

Keyence KV-5500

The Keyence KV-5500 is a robust, industrial controller utilizing a touchscreen interface and Ethernet connectivity for m...

Mid Range Discrete PLC Current

8.0 Great

Delta AS Series

The Delta AS Series is a robust, programmable industrial controller designed for diverse automation applications, offeri...

Multi Axis High End Delta PLC

7.9 Good

Schneider Electric Modicon Premium

The Schneider Electric Modicon Premium is a versatile, programmable industrial controller designed for mid-sized applica...

Modular Legacy Schneider Discrete

7.7 Good

Emerson PACSystems RX7i

The Emerson PACSystems RX7i is a rugged, single-board industrial controller utilizing a real-time operating system for a...

High End Process Current Emerson

7.7 Good

summarize Quick Comparison Summary

Alternative	Score	vs Siemens SIMATIC...	Action
Allen-Bradley ControlLogix Universal Industrial Controller Rockwell Multi Discipline High End	9.2 Excellent	+0.3	Compare
Mitsubishi MELSEC iQ-R Series Universal Industrial Controller Mitsubishi High End PLC	9.1 Excellent	+0.2	Compare
B&R X20 Automation System Universal Industrial Controller Modular Multi Axis PLC	9.1 Excellent	+0.2	Compare
Siemens SIMATIC S7-300 Universal Industrial Controller Modular Legacy Manufacturing	8.9 Great	Same	Compare
Siemens SIMATIC S7-1200 Universal Industrial Controller Compact PLC Siemens	8.7 Great	-0.2	Compare
Mitsubishi MELSEC Q Series Universal Industrial Controller Modular Legacy Manufacturing	8.7 Great	-0.2	Compare
Mitsubishi MELSEC FX5U Universal Industrial Controller Compact Mitsubishi PLC	8.7 Great	-0.2	Compare
Keyence KV-8000 Universal Industrial Controller High Speed PLC Current	8.7 Great	-0.2	Compare
Allen-Bradley SLC 500 Universal Industrial Controller Modular Legacy Rockwell	8.5 Great	-0.4	Compare
Omron Sysmac NX1P2 Universal Industrial Controller Compact Omron PLC	8.5 Great	-0.4	Compare

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help Frequently Asked Questions

What are the best alternatives to Siemens SIMATIC S7-400?

The top alternatives to Siemens SIMATIC S7-400 in 2026 include Allen-Bradley ControlLogix, Mitsubishi MELSEC iQ-R Series, B&R X20 Automation System, Siemens SIMATIC S7-300, Siemens SIMATIC S7-1200. Each offers unique features and is objectively scored on Lunoo to help you compare.

How does Siemens SIMATIC S7-400 compare to its competitors?

Our AI-powered comparison system analyzes features, pricing, user reviews, and expert opinions to provide objective scores. Siemens SIMATIC S7-400 scores 8.9/10. Click any alternative above to see a detailed side-by-side comparison.

Is Siemens SIMATIC S7-400 worth it in 2026?

Siemens SIMATIC S7-400 scores 8.9/10 on Lunoo, making it a highly-rated option in the Universal Industrial Controller category. However, alternatives like Allen-Bradley ControlLogix may better suit specific needs.

What is the best free alternative to Siemens SIMATIC S7-400?

Several alternatives to Siemens SIMATIC S7-400 offer free plans or free tiers. Check the alternatives listed above and visit their websites to compare pricing and free options.

Why should I switch from Siemens SIMATIC S7-400?

Common reasons users look for Siemens SIMATIC S7-400 alternatives include pricing, specific feature gaps, better integration needs, or simply exploring newer options. Our objective scoring helps you compare without bias.

How many alternatives to Siemens SIMATIC S7-400 are there?

Lunoo currently lists 20 scored alternatives to Siemens SIMATIC S7-400 in the Universal Industrial Controller category, ranked by our AI-powered evaluation system.

Which Siemens SIMATIC S7-400 alternative has the highest rating?

Allen-Bradley ControlLogix currently holds the highest rating among Siemens SIMATIC S7-400 alternatives with a score of 9.2/10.

Can I use Allen-Bradley ControlLogix instead of Siemens SIMATIC S7-400?

Allen-Bradley ControlLogix is one of the top-rated alternatives to Siemens SIMATIC S7-400. While they serve similar purposes in the Universal Industrial Controller space, each has distinct strengths. Use our comparison tool above for a detailed side-by-side analysis.

What is the cheapest alternative to Siemens SIMATIC S7-400?

Pricing varies among Siemens SIMATIC S7-400 alternatives. We recommend checking each alternative's website for current pricing. Many options in the Universal Industrial Controller category offer free tiers or competitive pricing.

How are Siemens SIMATIC S7-400 alternatives ranked on Lunoo?

Lunoo uses an AI-powered scoring system that analyzes category fit, feature coverage, pricing signals, public reception, recency, and value to provide 0 to 10 scores. Rankings are updated continuously.

Siemens SIMATIC S7-400 vs Allen-Bradley ControlLogix: which is better?

Siemens SIMATIC S7-400 scores 8.9/10 while Allen-Bradley ControlLogix scores 9.2/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.

Siemens SIMATIC S7-400 vs Mitsubishi MELSEC iQ-R Series: which is better?

Siemens SIMATIC S7-400 scores 8.9/10 while Mitsubishi MELSEC iQ-R Series scores 9.1/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.

Siemens SIMATIC S7-400 vs B&R X20 Automation System: which is better?

Siemens SIMATIC S7-400 scores 8.9/10 while B&R X20 Automation System scores 9.1/10 on Lunoo. The best choice depends on your specific needs. Use our detailed comparison tool for a full breakdown.

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